解方程组 x+2y=3 3x-y=5 x-2/3=y+4/5 2x-7y=90{x+2y=3 3x-y=5} {x-2/3=y+4/5 2x-7y=90}

解方程组3x+5(x+y)=2 3y-2(x+y)=4 解方程组:{x+y=3,x-y=5 解方程组 y=2x x+y=3 解联立方程组 x/x+y=5/8 x/x+y+6=2/3 解方程组3分之x-y=2分之 x+y解方程组3分之x-y=2分之 x+y；2x-5y=7 解分式方程组x+y/3-3/x-y=2 x+y/5+2/x-y=5 解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2 解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y) 解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组 解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1 解方程组 (x+y)^2-3(x+y)=54 (x-y)^2-5(x-y)=14 解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1} 解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27 解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12